package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 线程池
 * 1.重复使用线程
 * 2.控制线程数量
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        //创建线程池
        ExecutorService threadPool= Executors.newFixedThreadPool(2);
        for (int i = 0; i < 10; i++){
            Runnable r=new Runnable() {
                public void run() {
                    Thread t=Thread.currentThread();
                    System.out.println(t+"正在执行任务...");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(t+"执行完毕");
                }

            };
            threadPool.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
        threadPool.shutdownNow();
        System.out.println("线程池关闭了");



    }
}
